For GPU? My GTX260 on stock air would sit in the upper 50's on idle, then under load would hit the mid-to-upper 70's. Never broke 80 though, that was my NB's job...BSOD every time it topped 80.
My pre-RMA GTX260 under water would idle at 33-34C, and then max out at 35-36C under load. I haven't gotten the new GTX260 under water yet (see Zeus' worklog to find out why), but I expect it'll probably run a C or two hotter since it has, what, 24 more stream processors?